jika (f o g ) (x + 1 ) = 2x + 3 dan g (x+1)= x tentukan f (x)

Kelas 10 Matematika
Bab Fungsi Komposisi

(fog) (x + 1) = 2x + 3
(fog) (x + 1) = 2(x + 1) + 1
(fog) (x) = 2x + 1

g(x + 1) = x
g(x - 1 + 1) = x - 1
g(x) = x - 1

(fog) (x) = 2x + 1
f(x - 1) = 2x + 1
f(x - 1) = 2(x - 1) + 3
f(x) = 2x + 3